EP 0347031 A3 19910102 - ADJUSTING APPARATUS FOR ADJUSTING SOUND VOLUME OR SOUND QUALITY
Title (en)
ADJUSTING APPARATUS FOR ADJUSTING SOUND VOLUME OR SOUND QUALITY
Publication
Application
Priority
JP 14482588 A 19880614
Abstract (en)
[origin: EP0347031A2] The apparatus for adjusting sound volume or sound quality of a signal reproduced from a music source (1) has an electronic volume section (2) with a group (23) of analog switches. The apparatus includes a signal generating means (112) which generates a signal for switching the group of analog switches at the approximately zero-cross point of the reproduced signal of the music source, thereby preventing any discontinuous portion in the output signal.
IPC 1-7
IPC 8 full level
H03G 3/00 (2006.01); H03G 3/02 (2006.01); H03G 3/04 (2006.01); H03G 3/34 (2006.01); H03G 5/02 (2006.01); H03K 17/13 (2006.01)
CPC (source: EP US)
H03G 3/001 (2013.01 - EP US); H03G 3/04 (2013.01 - EP US); H03G 3/348 (2013.01 - EP US)
Citation (search report)
- [X] EP 0144143 A2 19850612 - VICTOR COMPANY OF JAPAN [JP]
- [X] PATENT ABSTRACTS OF JAPAN, vol. 10, no. 54 (E-385)[2111], 4 March 1986; & JP - A - 60 206 209 (TEAC K.K.)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0347031 A2 19891220; EP 0347031 A3 19910102; EP 0347031 B1 19950621; DE 68923128 D1 19950727; DE 68923128 T2 19960222; JP 2591656 B2 19970319; JP H01314409 A 19891219; US 4924192 A 19900508
DOCDB simple family (application)
EP 89303943 A 19890420; DE 68923128 T 19890420; JP 14482588 A 19880614; US 33807389 A 19890414